Mitac PD10AI-N4200 mainboard
https://mitxpc.com/products/pd10ai-n4200
8 GB of RAM
120 GB Kingston M.2 boot SSD
2x 4 TB Samsung 860 EVO data SSD stripe
holds 55 datasets with 15000+ daily snapshots
passive cooled, consumes only 10-15 W of electrical power
running TrueNAS-13.0-U3.1
in 7x24 operation since summer 2019